Palm unlike sword or gun is a symbol of peace. For swords then [time Jesus was on world] and guns in modern time were and are tools of bloody revolution and insurrection. But Jesus’ revolution of social-universal-culture premised on peaceful coexistence was and is fulfilled and achieved through teaching.
Luke 23 : 5 ; But they insisted, “He stirs up the people all over Judea by his teaching. He started in Galilee and has come all the way here.” end of quote.